getValue method
Calculates value in logical pixel.
Implementation
double? getValue(
InheritedProperties resolved, {
double? baseValue,
double? scaleFactor,
}) {
double value;
var effectiveScaleFactor = scaleFactor ?? 1.0;
switch (unit) {
case CssLengthUnit.auto:
return null;
case CssLengthUnit.em:
baseValue ??= resolved.style.fontSize;
if (baseValue == null) {
return null;
}
value = baseValue * number;
effectiveScaleFactor = 1;
break;
case CssLengthUnit.percentage:
if (baseValue == null) {
return null;
}
value = baseValue * number / 100;
effectiveScaleFactor = 1;
break;
case CssLengthUnit.pt:
value = number * 96 / 72;
break;
case CssLengthUnit.px:
value = number;
break;
}
return value * effectiveScaleFactor;
}